The pinnacle of personal defense system mechanics and innovation, the Master Chief's Mark VI MJOLNIR armour, the armour of a SPARTAN, is more an extension of himself than a suit. With features built into its structure including energy shields, multiple weapons system tracking, bio-foam and an extreme trauma protection "lockdown" mode, the armour offers both protection and support for the Chief, assisting the healing of his injuries and enhancing his abilities, allowing him near indefinite autonomous function.